Photoacoustic detection of trace gases with an optical microphone

J. Breguet; Jean-Paul Pellaux; Nicolas Gisin

doi:10.1016/0924-4247(95)00848-9

Abstract

1 min read

An alternative to the electrical microphone for photoacoustic detection of trace gases is presented. This new microphone is made of standard monomode optical fibers wound and glued on a thin plate and is one of the arms of a Michelson interferometer. A detection scheme with a Sagnac interferometer has also been used and has given better results. Three cells working with different resonance modes and different microphone configurations have been tested.

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